Samsung Galaxy S21 Ultra
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It's not possible to turn on my phone
Solution 3 of 3: Your phone doesn't turn on correctly
Before you can turn on your phone, you need to insert your SIM into your phone.
If you're asked to key in your PIN, do so and press OK. The default PIN is 1111.
Slide two fingers downwards starting from the top of the screen.
Press the power off icon.
Press Power off.
Press Power off.